Leptospermee.) LXVIL MYRTACEJE. 711 
Species austro-Africana, Harv. et Sond. Fl. Cap. ii. 621, a exteris differt habitu, foliis hine inde 
alternis et cymis omnibus axillaribus. 
39. Xanthostemon, F. Muell. in Hook. Kew Journ. ix. 17, ex parte. (Fremya, Brongn. 
et Gris in Bull. Soc. Bot. Fr. x. 74, et in Ann. Sc. Nat. ser. 5. i, 131.)—Calycis tubus 
late eupulatus v. explanatus, basi ovario plus minus adnatus; limbi segmenta 4-5, smpe 
Ansmqualia. Petala 4-5, patentia. Stamina co, petalis multo longiora, l-seriata, libera 
X. basi irregulariter connata, filamentis filifermibus nune rigidulis; anthers versatiles, 
connectivo tamen nonnunquam dilatato et cum loculis circa filamenti apicem quasi in 
ealyptram eonnato. Ovarium calycis tubo inclusum, semi-inferum v. fere superum, vertice 
depressum, 2—-6-loculare; stylus filiformis, stigmate parvo; ovula in loculis co, cirea. pla- 
centam clavatam v. peltatam in annulum densissime conferta. Capsula basi lata adnata, 
oreterum libera, calyci explanato insidens v. tubo eupulato semi-inclusa; loculicide dehiscens. 
Semina oo, complanata, semiorbiculata v. cuneata, dorso sspe angulata, testa tenui; 
embryo rectus v. leviter incurvus, cotyledonibus sepius cordatis planis w. conduplicatis 
radicula longioribus.—Arbores fruticesve. Folia alterna, pennivenia. Flores in cymas 
axillares pedunculatas dispositi, v. rarius subsolitarii, v. ad apices ramorum conferti. 
Species ad 12, quarum 2 Australiz tropicz cxterze Nove Caledonis incole. Bent. FI. Austral. 
iii. ined. — Brongn. et Gris, l. c. — Labill. Sert. Austr. Caled. t. 59 (Metrosideros). | Rev. Hortic. 1865, 
310 cum ic.—Genus a F. Muellero Fragm. i. 243, iterum ad Meérosiderum reductum, sed ovulorum 
dispositione et foliis alternis nobis satis distinctum videtur. 
DnaranNAUDIA, Montrouz. i Mem. Acad. Lyon. x. 205, species 1 ex ins. Art, Novze Caledoni:e, 
nobis igneta, ex charactere dato nullo signo a .Yaathostemone differt, Placentatio tamen non 
deseribitur. 
40. Backhousia, ZZook. e? Harv. Bot. Mag. t. 4133.—Calycis tubus turbinatus v. late 
campanulatus, basi ovario adnatus; limbi segmenta 4, subpetaloidea v. scariosa, persistentia. 
Petala 4, calycis lobis breviora v. vix longiora, ssepius persistentia. Stamina oo, oc-seriata, 
libera, filamentis filiformibus; antherz versatiles, loculis parallelis longitudinaliter dehis- 
centibus. Ovarium in fundo calycis inferum v. semisuperum, 2-loculare, vertice plano- 
convexo v. conico ad stylum haud impresso; stylus filiformis, stigmate parvo; ovula in 
loculis oo, in placenta ad axin adnata v. ab apice pendula, recurva v. pendula. Capsula 
calyce persistente inclusa v. e tubo semiexserta, ut videtur indehiscens sed in coccos 2 
facile partibilis, Semina (nobis vix perfecte nota) obovoidea v. cuneata; embryo rectus, 
cotyledonibus (an semper?) conduplicatis radicula longioribus.—Arbores  fruticesve. 
Folia opposita, pennivenia. Flores in pedunculos axillares cymosi subcapitati v. umbellati. 
Bracte:x caducissimze. 
Species 4, Australie orientalis incole. Benth. Fl. Austral. iiü. ined. In JB. citriodora, F. 
"Muell, flores umbellati, ovarium et capsula vertice conieze, ovula placentz ab apice loeuli penduloe 
affixa; in Z. sciadophora, inflorescentia B. citriodore, ovarium et capsula convexw nee conicz, et 
placentatio omnino specierum normalium, 
41. Osbornia, F. Muell. Fragm. Phyt. Austral, iii. 30.—Calycis tubus turbinatus, supra 
ovarium haud productus; limbi segmenta 8, subzequalia, persistentia, Petala 0. Stamina 
oo, 92-S-seriata, libera, vix exserta, filamentis filiformibus; antherz parve, versatiles, 
loculis parallelis longitudinaliter dehiscentibus. Ovarium inferum, imperfecte 2-loculare; 
stylus subulatus, crassiuscnlus, stigmate parvo ; ovula oc, ad utrumque latus septi brevis v. 
plicentz  basilaris brevis inserta. Fructus calycis tubo vix aucto adnatus et inclusus, 
paw persistente coronatus, (siccus?), indehiscens. semina 1—2, obovoidea, testa tenui; 
embryo rectus, cotyledonibus crassis plano-compressis v. subhemisphzerieis radicula longi- 
oribus.—Frutex, floribus exceptis, glaber. Folia opposita, obovata, oblonga, pennivenia. 
Flores parvi, cano-tomentosi, sessiles, ad axillas solitarii v. terminales, terni. Bracteole 2 
caducze. 
Species 1, Australie tropicze incola. 
